Did Hungary lose most of its population after World War 1?

Yes, Hungary experienced a significant population loss after World War I, primarily due to the Treaty of Trianon in 1920. This treaty resulted in Hungary losing about two-thirds of its territory and a substantial portion of its ethnic Hungarian population, as regions were ceded to neighboring countries like Romania, Czechoslovakia, and Yugoslavia. The population loss was not only territorial but also demographic, as many people were displaced or became minorities in their new countries. This had lasting social and economic impacts on Hungary.